28303172 has 12 divisors (see below), whose sum is σ = 50158080. Its totient is φ = 13972296.

The previous prime is 28303139. The next prime is 28303189. The reversal of 28303172 is 27130382.

It is a super-3 number, since 3×28303172³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44468 + ... + 45099.

It is an arithmetic number, because the mean of its divisors is an integer number (4179840).

Almost surely, 2^28303172 is an apocalyptic number.

It is an amenable number.

28303172 is a deficient number, since it is larger than the sum of its proper divisors (21854908).

28303172 is a wasteful number, since it uses less digits than its factorization.

28303172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89650 (or 89648 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 28303172 is about 5320.0725558962. The cubic root of 28303172 is about 304.7509280722.

The spelling of 28303172 in words is "twenty-eight million, three hundred three thousand, one hundred seventy-two".